Skip to main content

Full text of "Handbook Of Chemical Engineering - I"

See other formats


THE TRANSPORTATION OF LIQUIDS TABLE   6.Concluded
133
Substance	Condition	Chem. symb.	Material	Valve service	Remarks
Sulphide of sodium  .	Cold		RF	R	
Sulpholignic salts ........	Con		AB	R	
Sulpholignic salts	Dil		BF	R	
Sulphur dioxide ..........		SO 2	AB	R	Refrigeration
Sulphuric acid	Con	H2SO4	A.I	LO	Is oil of vitriol    Sb Pb fitted
Sulphuric acid             . .     .	Dil		EL	LO	Wood- or Sb Pb -lined C  I
Sulphuric acid	Dil		AB	LO	
Sulphuric acid fuming		28207	RF	LO	
Sulphuric acid, 60B ..........	Hot		AI	R	
Sulphuric acid, 40B6 ..........	Hot		Pb	R	
Sulphurous acid    .............	Con.	H2S03	E	R	
Sulphurous acid ...............	Dil.		AB	R	
Sulphurous acid, gaseous .......			BF	R	
Sweet water ...................			BF	R	Sugar mill
Syrup       . .           ......			AB	LO	
Tan liquor			AB	R	
Tar       ................			AI	LO	
Tar and ammonia in water .....			AI	R	Traces
Turpentine oil           ........			AI	R	No rubber
Urine    .                      ....			AB	R	
Vinegar ...................			AB	R	11s   impure   diluted   acetic
or			AM	R	acid    Affects Fe less than
Vitriol blue		CuSO*	AB	R	bronze
Vitriol, green               ........		FeSO*	AI	LO	
Whiskey ......................			AB	R	
Wine			AB	R	Usually contains malic acetic
W"ood pulp			BF	LO	or tartaric acid Paper mill
Wort                                   ......			AB	R	Is infusion of malt
Yeast    .................			BF	LO	
Zinc nitrate		Zn(NO-))^	AB	R	}Like potassium nitrate
Zinc sulphate               .        .     ...		ZnSO4	AB	R	and sulphate
					
The capacity of a pump is generally understood to mean the actual amount of water pumped per unit of time. Q = VEV, where Q = capacity, usually in gallons per minute, or 24 hr., V = net displacement of plunger or pump piston in same unit, Ev = volumetric efficiency = 1  slip. The net displacement V = displacement of plunger minus displacement of rod. In an ordinary case, where the rod is submerged at one end only, it acts like a single-acting plunger, and in opposition to the main plunger. Displacement of plunger Vp = (D27r -T- 4)8 X 12 -* 231 = O.O-lOcSZKS U. S. gal. per minute. Displacement of rod Vr = 0.0204r/2$, where D = diameter of plunger, inches, andd = diameter of the plunger rod, inches, and S = piston speed feet per minute, then V = VP  Vr.
From Table VII the displacement, VP, of a single double-acting plunger can be found for a piston speed of 100 ft. per minute. To find the net displacement deduct the displacement of the rod, Vr, which if submerged at one end only, is one-half of the value given in the table.
For any other piston speed multiply the result by /S/100.
For single single-acting pumps divide V by 2, for duplex double-acting pumps multiply V by 2, for triplex single-acting pumps multiply by %, etc. In some types, such as outside end-packed plunger pumps the rod is not submerged and the full area of the